Wood-bending.



No. 209,204. Patented Sept. us, I902."

. s. CLARK.

WOOD BE'NDING.

(Application filed Jan. 6. 1802.)

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UNITED STATES LATENT SPENCER CLARK, OF NORTHVILLE, MICHIGAN, ASSIGNOR TO ARCHIE MORRIS AND CHARLES WALTERS, OF NORTHVILLE, MICHIGAN.

WOOD-BENDING.

SPECIFICATION forming part of Letters Patent No. 709,204, dated September 16, 1902.

Application filed January 6. 1902. Serial No. 88.481. (No model.)

To all whom, it may concern.-

Be it known that I, SPENCER CLARK, a citizen of the United States, residing at Northville, county of Wayne, State of Michigan, have invented a certain new and useful Improvement in VVood-Bending to Form Round Bent Corners; andI declare the following to be a full, clear, and exact description of the about which the board or piece is bent.

which--- invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings,which form a part of this specification.

My invention pertains to wood-bending to form round bent corners; and it consists of the novel constructions and combinations hereinafter described and claimed, and illustrated in theaccompanying drawings, in

My invention is particularly applicable to.

the construction of water-closet tanks and is shown in connection therewith in Fig. 1. I do not, however, limit myself to the adaptation of myinvention solely to water-closet tanks, as it may be applied to stair construction, to music-boxes, and other analogous constructions.

In carrying out my invention, a represents acontinuous piece of wood of any desired length, Width, and thickness, from which the wall of a tank, box, or other structure is formed. In Fig. 1 said piece is shown as forming one side and the two ends of a tank,

the same being bent to form two round corners of the tank. This piece or board is provided with one or more corner recesses or grooves 19, each to receive a corner-strip c, This corner-strip is made rounding on one side thereof, as shown at d.

In the formation of water-closet tanks I prefer that the opposite face of the strip shall be formed with a rectangulargroove, (shown at e.) The strip is formed with lateral surfaces f g, which diverge in the direction 10- ward the rounded portion (1 of the strip,.

forming angles or corners ht between the lateral surfaces f g and the rounded portion d. In forming the recesses b in the piece a it is obvious that the outer wall j of the recesses is made quite thin to be suitably bent about the curved portion of the strip to form a rounded corner. Heretofore in similar constructions this wall j of the recess has been made with a straight inner face throughout the recesses, terminating laterally in rectangular corners, as indicated by the dotted lines in Fig. 3, thereby weakening the wall at'said corners, in consequence of which weakening said wall was liable to break at said corners in bending the same about the rounded surface of the strip. This has heretofore been a very serious difficulty. To remedy this difficulty is the special feature of my invention. To overcome this difficulty, I reinforce the wall of the groove adjacent to the corners of the groove, as shown at 70 Z, by thickening said wall adjacent to said corners. To allow for said thickening or reinforcement of said walls at 70 l, the rounded surface (1 of the strip entering the groove is correspondingly cut away adjacent to the corners ht thereof, as shown at m n. This permits the reinforced portions 76 Z of the wall to fit in snugly about the corner-strip. This reinforcing of said wall adjacent to the corners of the recess and the corresponding cutting away of the corner-strip adjacent to the corners h 11 thereof enables the wall to be bent about the corner-strip without breakage and successfully accomplishes the bending of the wood about the corner-strip. The Wall at the back of the recess, it will be seen, is reinforced adjacent to the corners of the recess by thickening, and thereby strengthening,the walls at these points.

What I claim as my invention is--- A bent corner structure comprising a piece of wood formed with one or more recesses having a thin outer wall, and a corner-strip in saidirecess rounded on the side thereof ad- In testimony whereof I sign this specificajacent to said wa1l,said piece bent about the tion in the presence of two witnesses. curved side of the corner piece, said wall thickened and reinforced adjacent to the cor- SPENCER CLARK ners of said recess, and said'corner-strip cor- Witnesses:

respondingly cut away adjacent to the rein- C. A. DOLPH,

forced portions of said wall. W. E. AMBLER. 

